How to show records vertically in mysql command line?

I think you are using \g instead of \G. Unless you use \G you get default output pattern. Default is \g.

mysql> show databases\g
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.00 sec)

mysql> show databases\G
*************************** 1. row ***************************
Database: information_schema
*************************** 2. row ***************************
Database: mysql
*************************** 3. row ***************************
Database: test
3 rows in set (0.00 sec)

EDIT: some more better examples:

this is default output:

mysql> desc reviews_by_device;

+----------------------+--------------+------+-----+---------+----------------+
| Field                | Type         | Null | Key | Default | Extra          |
+----------------------+--------------+------+-----+---------+----------------+
| ar_id                | int(10)      | NO   | PRI | NULL    | auto_increment |
| ar_pkg_name          | varchar(50)  | YES  |     | NULL    |                |
| ar_ver_code          | int(5)       | YES  |     | NULL    |                |
| ar_ver_name          | float(3,2)   | YES  |     | NULL    |                |
| ar_rev_lang          | varchar(10)  | YES  |     | NULL    |                |
| ar_device            | varchar(250) | YES  |     | NULL    |                |
| ar_rev_submit_dttm   | datetime     | YES  |     | NULL    |                |
| ar_rev_submit_milli  | varchar(20)  | YES  |     | NULL    |                |
| ar_rev_last_updttm   | datetime     | YES  |     | NULL    |                |
| ar_rev_last_updmilli | varchar(20)  | YES  |     | NULL    |                |
| ar_star_rating       | int(1)       | YES  |     | NULL    |                |
| ar_rev_title         | varchar(250) | YES  |     | NULL    |                |
| ar_rev_Text          | mediumtext   | YES  |     | NULL    |                |
| ar_dev_rpl_dttm      | datetime     | YES  |     | NULL    |                |
| ar_dev_rpl_milli     | varchar(20)  | YES  |     | NULL    |                |
| ar_dev_rpl_text      | mediumtext   | YES  |     | NULL    |                |
| ar_rev_link          | varchar(250) | YES  |     | NULL    |                |
+----------------------+--------------+------+-----+---------+----------------+
17 rows in set (0.00 sec)

this is vertical report by ego command use:

mysql> desc reviews_by_device\G

*************************** 1. row ***************************
  Field: ar_id
   Type: int(10)
   Null: NO
    Key: PRI
Default: NULL
  Extra: auto_increment
*************************** 2. row ***************************
  Field: ar_pkg_name
   Type: varchar(50)
   Null: YES
    Key:
Default: NULL
  Extra:
*************************** 3. row ***************************
  Field: ar_ver_code
   Type: int(5)
   Null: YES
    Key:
Default: NULL
  Extra:
*************************** 4. row ***************************
...
17 rows in set (0.00 sec)